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casting in c# works sometimes

I have a c# client dll that calls a c# component on a server. When I register
the c# component on the server, everything works great. If the component is
not accessed for a while or I access it the next day, I get a Specified cast
is not valid error. If I reregister the server component, everything works
fine. The type is a runtime type that it cannot cast to at times. The code is

public HIS.CSRData.DataAccess CreateDataAccess()
//declare variable
HIS.CSRData.DataAccess da;

//declare type
Type oServer;

//set variable value
oServer = Type.GetTypeFromProgID("HIS.CSRData.DataAccess",

---this is where the error occurs
//set variable and create object
da = (HIS.CSRData.DataAccess)System.Activator.CreateIns tance(oServer);

//return value
return da;

Thanks in advance for any help.
Jul 21 '05 #1
0 733

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