Quick Click gives crash (Fatal error)

I have placed a dwglist, and it qseems to work fine.
But when i click 2 times quick agter each other then I get a fatal eror in AutoCAD.
There are 2 events on this dwglist: FolderChanged and SelChanged
Now I know it içs with 2 fast clicks, I have added a doubleclick event but before I see this alerts, he still crashes

Someone an idea?

AutoCAD Civil3D 2010 +2012
Windows 7 X64

Hi, Pieter, would you be so kind to explain it more in detail, what you've started and where you've picked, which OS and CAD platform you're using. A small sample would help to support you very close.

Regards, Fred

It is a routine to search in our bib.
The upper part is with a directorie structure
when you browse the dwgpreview will show the dwg in question

in the middel, there are some keys to search  in the mdb file (concerning the same bib)
at the bottom is the result of the mdb sql query.
when you click on this, the preview is again showed

The problem is the dwglist (top left).
Any help is nice, when I can give more feedback let me know

Regards

On the moment we are using
OpenDCL Runtime [5.1.2.3] loaded
But I have tried with opendcl 6 but the same result.

Also the AutoCAD Civil3D 2010 and  AutoCAD Civil3D 2012 the same problem.
Windows7 64bit

Solved
When i put  one by one my trigger off
i found that i trigger  my event again in the event procedure