getting error "com.ctc.wstx.exc.WstxUnexpectedCharException: Unexpected character '-' (code 45) in prolog; expected '<'

[Sudhir Mongia]

Hi,
We are using Axis 1.4 and getting the following error sometimes while doing
stress testing. In normal testing we are getting proper results.

"com.ctc.wstx.exc.WstxUnexpectedCharException: Unexpected character '-'
(code 45) in prolog; expected '<'
at [row,col {unknown-source}]: [2,1]"

Any clue.

Thanks,
Sudhir Mongia