Xlib issues:asyn reply

    Hi
       to all

      Iam buildin a kde Application that uses Xlib .
       Iam using  pthread_cond_wait() so that the running
       worker thread will wait untill the GUI thread give
       signal or finished his work .

      But suppose the worker thread blocked some X resources and waiting
      for the signal . If the next thread need those resources
      then there going to be problem .
      So in my case how will ensure that blocked working thread will
      release   all the X resources so that the GUI thread can
      use that X resources .I have used separate display connection
      for each thread .

     I pause the current pthread and invoke an dialog in
    another thread the following error is coming
:
    Xlib : unexpected async reply
    Xlib :    sequence lost (0x1718e > 0x71a0) in reply to 0x0!
    X Error : BadImplementation (server does not implement opertaion) 17
     Major opcode : 20
     MInor opcode : 0
     Resource id  : 0x759d1
   The error is coming randomly , not always .
       can anyone help to resolve this issues .
    ur help will be greatly appreciated .

Thanks in advance
to all