Unusual Error Need some help SMPP application crashes

[aallvvii]

my program stop working and give me this error can anybody help me on this. i am using this dll

Description:
Stopped working

Problem signature:
Problem Event Name: CLR20r3
Problem Signature 01: SMPP.exe
Problem Signature 02: 1.0.0.0
Problem Signature 03: 4b97cfeb
Problem Signature 04: mscorlib
Problem Signature 05: 2.0.0.0
Problem Signature 06: 4a27471d
Problem Signature 07: 11c2
Problem Signature 08: 14
Problem Signature 09: System.InvalidOperationException
OS Version: 6.1.7600.2.0.0.274.10
Locale ID: 1033

[alt]

You can use event evError and store all cases to some log file.
Also evReceiveData and evSendData could help to analyze your problem.