Thread: Error when loading client..[562]

Hey, somehow I get this error when I run the client.
The client loads but I can only log in once.
If I try to log in again after I have logged out once with the same client session I get another error.

Well here are the error's:

When Running the client (Server is running too!)

Code:

log4j:WARN No appenders could be found for logger (org.apache.mina.filter.execut
or.ExecutorFilter).
log4j:WARN Please initialize the log4j system properly.

I thought this error was gone :/
Well after a few relogs with a couple of diffrent accs I got this error:

Code:

Exception in thread "WorkerThread" com.thoughtworks.xstream.converters.Conversio
nException: start : start : start : start
---- Debugging information ----
message             : start : start
cause-exception     : com.thoughtworks.xstream.mapper.CannotResolveClassExceptio
n
cause-message       : start : start
class               : com.rs2hd.model.Player
required-type       : com.rs2hd.model.Player
path                : /player/start
line number         : 85
-------------------------------
        at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshall
er.java:88)
        at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(A
bstractReferenceUnmarshaller.java:55)
        at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnm
arshaller.java:75)
        at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnm
arshaller.java:59)
        at com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller
.java:142)
        at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.unmarsh
al(AbstractTreeMarshallingStrategy.java:33)
        at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:907)
        at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:893)
        at com.thoughtworks.xstream.XStream.fromXML(XStream.java:845)
        at com.rs2hd.io.XStreamPlayerLoader.load(XStreamPlayerLoader.java:35)
        at com.rs2hd.WorkerThread.run(WorkerThread.java:71)
        at java.lang.Thread.run(Thread.java:619)
Caused by: com.thoughtworks.xstream.mapper.CannotResolveClassException: start :
start
        at com.thoughtworks.xstream.mapper.DefaultMapper.realClass(DefaultMapper
.java:68)
        at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper
.java:38)
        at com.thoughtworks.xstream.mapper.DynamicProxyMapper.realClass(DynamicP
roxyMapper.java:71)
        at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper
.java:38)
        at com.thoughtworks.xstream.mapper.ClassAliasingMapper.realClass(ClassAl
iasingMapper.java:86)
        at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper
.java:38)
        at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper
.java:38)
        at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper
.java:38)
        at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper
.java:38)
        at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper
.java:38)
        at com.thoughtworks.xstream.mapper.ArrayMapper.realClass(ArrayMapper.jav
a:96)
        at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper
.java:38)
        at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper
.java:38)
        at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper
.java:38)
        at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper
.java:38)
        at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper
.java:38)
        at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper
.java:38)
        at com.thoughtworks.xstream.mapper.CachingMapper.realClass(CachingMapper
.java:52)
        at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConv
erter.determineType(AbstractReflectionConverter.java:318)
        at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConv
erter.doUnmarshal(AbstractReflectionConverter.java:196)
        at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConv
erter.unmarshal(AbstractReflectionConverter.java:150)
        at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshall
er.java:81)
        ... 11 more