Dsapi error

We encountered an authentication problem usingDSAPI filter.

The GetRequestContents() call failed with retcode = 1004 (DSAPI_INTERNAL_ERROR)

in Domino release.6.03 and 6.5 while works well

with Domino R5.12.

E.G.

unsigned int authenticate(FilterContext *fc, FilterAuthenticate *authData)

{

unsigned long	retCode;

char 			*reqContents;





retCode = 0;

fc->GetRequestContents(fc, &reqContents, &retCode);



if (retCode)

	Log("getRequestContent(): %lu", retCode);

Can anybody help us?

Thank you in advance for any preciuos suggestion.