Unsafe codes in a webservice

Question

Hello,

I try to create a webservice with VS2010 and .Net 4.
This service has to execute unsafe code from an external Delphi-Dll.

I have also created a console application which uses the same code and it works well.
But when I execute the webservice I get error messages caused by executing code in the protected memory.

Is there a configuration setting to use unsafe code in a webservice?

Regards,

sweisse