Serialization

HI guys,

my problem is the following :

I must serialize an httprequest to send it to my webservice to analyse it, but then I got this error :

Value of type "system.io.memorystream" cannot be convert to
"UAUTHTesting.WSUAuth.memorystream"


I don't understand why because in my webservice, I declared my parameter as "system.io.memorystream" as well