Running a VB.NET .EXE on Windows 7 32 bit

Hello,

We built a 32 bit VB.NET 2010 application (.EXE) and launched it on a Windows 7 32 bit laptop.

After launching, we received the following error:

Problem signature:
Problem Event Name: CLR20r3
Problem Signature 01: tabbed_meeting_manager_winxp.exe
Problem Signature 02: 1.0.0.0
Problem Signature 03: 518e4e0c
Problem Signature 04: Tabbed_Meeting_Manager_WINXP
Problem Signature 05: 1.0.0.0
Problem Signature 06: 518e4e0c
Problem Signature 07: 21
Problem Signature 08: 6
Problem Signature 09: System.InvalidOperationException
OS Version: 6.1.7601.2.1.0.256.48
Locale ID: 1033
Additional Information 1: 0a9e
Additional Information 2: 0a9e372d3b4ad19135b953a78882e789
Additional Information 3: 0a9e
Additional Information 4: 0a9e372d3b4ad19135b953a78882e789

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Interestingly, the application runs fine on Windows XP, and Windows 7 64 bit.

Has anyone seen this error and why it occurs?

Thank you!
pxmnh316