Crash at right click

Hi,

When i right click in text boxes in NAVISION i've got the message Microsoft Business Solutions has stopped work.

Problem signature:
Problem Event Name: APPCRASH
Application Name: fin.exe
Application Version: 4.0.3.24080
Application Timestamp: 45c3015e
Fault Module Name: fin.exe
Fault Module Version: 4.0.3.24080
Fault Module Timestamp: 45c3015e
Exception Code: c0000005
Exception Offset: 001bfea9
OS Version: 6.0.6000.2.0.0.256.6
Locale ID: 1048

Additional information about the problem:
LCID: 1033

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Could someone check this (must have Windows Vista with NAV 4 SP3 with VISTA Patch, on native database) to see what is happening when right click text boxes.

Thx in advance