VB and C# Integration

[MAF]

I have a C# program that references an Interop and then invokes a method in
a VB dll.

My system will work fine if the vbp is loaded in memory but will lock up the
system and the memory grows to about 1 gig.

Any ideas on what might cause this. No excpetion is thrown

Here is the signature of the VB app

Public Function GetScheduleVolume(ByVal Connstring As String, ByVal XMLIDS
As String, ByVal StartDate As Date, ByVal EndDate As Date, ByVal strError As
String) As colItems
Here is how it is called from C#

//this line works

TMConversion.clsConversion aHelper = new TMConversion.clsConversionClass();

//This line fails

TMConversion.colItems colItems =
aHelper.GetScheduleVolume(this.m_Connstring, XMLCOl, aStartDate, aEndDate,
strErrors);