Security: securityexception with web parts (SPSv2)

[Michael Ekegren]

Hi All

This is one for the experts!
I have developed a Web Part (in C#) which should list some entities from
Active Directory using System.DirectoryServices, all compile fine - but
when trying to execute the Web Part on a Web Part Page I keep getting a
"system.security.securityexception".

All comes down to the call:
DirectoryEntry d = new DirectoryEntry(ldapPath);

where ldapPath is any valid LDAP path towards our directory in the
format "LDAP://dc=domain,dc=com/cn=users,dc=domain,dc=com" or something
similar...

I have written tons of code using ADSI and COM and a quick vbs-script to
prove I'm hitting the right ldap-objects also evaluates to true.

However this DirectoryEntry call destoyes the Web Part page and breaks
with the securityexception error. I guess it has something to do with
the security levels in the .Net framework, but I don't know where to
look. I have tried to assign full trust security to my assembly using
the .net 1.1 wizard with no success.

Any inputs anyone...?

Best regards
Michael Ekegren