date problem in web service

Hello All ,

when m testing a web service its giving me an error " Deserialisation failed " .

<DescriptionText>An error occurred when deserializing in the simple transformation program /1BCDWB/WSS0090331042718968000</DescriptionText>

<DescriptionDetailText>? is not a valid date</DescriptionDetailText>

may be this is becouse of the date feilds in the output of the rfc.

can anyone tell me how to overcome this

thanks