Bug in XML signature??? Are there users than CAN answer????

Hi,

I already posted two items - but no one seems to have the knowledge to help
me out...
In the mean time I found out the following:

My existing signatures are testet using

SignedXml sXml = new SignedXml(licenses);
sXml.LoadXml(signature);
RSA csp = RSA.Create();

csp.FromXmlString(context.GetSavedLicenseKey(typeo f(MyLicense),
Assembly.GetCallingAssembly()));
sXml.SigningKey = csp;
if (sXml.CheckSignature())
m_SignatureState = Signature.Valid;
else
m_SignatureState = Signature.Invalid;

When I create a new signature, mehtod CheckSignature() suddenly returns
FALSE.... I used the same code as the valid signature!!!

I need to include KeyInfo while signing and MUST change to
//sXml.SigningKey = csp;
if (sXml.CheckSignature(csp))
m_SignatureState = Signature.Valid;
else
m_SignatureState = Signature.Invalid;

in order to get it working again.

Old signatures return TRUE on
sXml.SigningKey = csp;
if (sXml.CheckSignature())
m_SignatureState = Signature.Valid;
else
m_SignatureState = Signature.Invalid;

New signatures must have KeyInfo included and return TRUE on
if (sXml.CheckSignature(csp))
m_SignatureState = Signature.Valid;
else
m_SignatureState = Signature.Invalid;

Can anybody tell me why???

Can anybody tell me how to implement a signature WITHOUT <KeyInfo> in the
XML file???

Please help me out,
Hans.