Soap http call is failing occasionally

Hi All,

I am using custom soap processor to invoke one of wm flow processing service. Asp applicaiton is calling this service uisng http.
Out of 100 times some times ther are getting
"Fault Code: SOAP-ENV:Client
Fault String: [B2BSERV.0088.9118] Parameter soapResponseData must be a
valid soapData Fault Actor:
" this error.
Then after some time automatically it is working without any changes in the code. Have any body seen this.
Because of some networks problem we see this kind of errors?