Internal Server Error

[Ramzy]

Hi,

I've deployed correctly a service on axis beta1 engine but when I tried 
to call it with a client
it fails with the following error message :

     [java] Internal Server Error
     [java]     at 
org.apache.axis.transport.http.HTTPSender.invoke(Unknown Source)
     [java] Error
     [java]     at 
org.apache.axis.strategies.InvocationStrategy.visit(Unknown Source)
     [java]     at org.apache.axis.SimpleChain.doVisiting(Unknown Source)
     [java]     at org.apache.axis.SimpleChain.invoke(Unknown Source)
     [java]     at org.apache.axis.client.AxisClient.invoke(Unknown Source)
     [java]     at org.apache.axis.client.Call.invoke(Unknown Source)
     [java]     at org.apache.axis.client.Call.invoke(Unknown Source)
     [java]     at org.apache.axis.client.Call.invoke(Unknown Source)
     [java]     at org.apache.axis.client.Call.invoke(Unknown Source)
     [java]     at sample.SampleClient.main(Unknown Source)

can someone help me please on the possible mistakes I've done