I wrote a custom winform control in c#(dotnet1.1), hosted in IE, like this:

<OBJECT id="safe"
   style="Z-INDEX: 101; LEFT: 48px; WIDTH: 216px; POSITION: absolute; TOP:
24px; HEIGHT: 152px"
   height="152" width="216"
   classid="http:SafeTest.dll#SafeTest.UserControl"
VIEWASTEXT>
</OBJECT>

and i have a javascript, like this

document.getElementById("safe").Openxxx(aBase64String);

The javascript call a method (Openxxx) of my usercontrol, which Deserialize
an object from the
a memoryStream decoded from aBase64String.

But a exception raised:  Type is not resolved for Member xxx...
and sometimes security exception,
and sometimes: Unable to cast object of type 'myClass' to type 'myClass'

The usercontrol's dll was signed with a strong name,
I've add a new code group on the client machine, fulltrust to the strong
name

[assembly: AllowPartiallyTrustedCallers()]
and the version was frozen at:
[assembly: AssemblyVersion("1.0.10.10")]

Is there a clear architecture for host dotnet control in IE?

Thanks a lot.