Blitz3D crashes with a chord-sound?

When i have to apply a texture to my terrain, i use the requester from WinBlitz3D, and it works fine. But when i am loading a previous world in my editor, and i press a button to the requester, the whole program crashes with a windows chord-sound, and the program closes. Is this a memory problem or what???

If BCF_TestButton(cmdTerrTex) And STerrain<>0
file$=RequestFile("Open texture ...","Bitmap Files (*.bmp)|*.BMP|JPEG Files (*.JPG)|*.JPG|All Files (*.*)|*.*")
If FileType(file$)=1
tex=LoadTexture(file)
If tex
For e.Entity = Each Entity
If e\Ent = STerrain
e\DetailMap$ = file$
ScaleTexture tex,8,8
EntityTexture e\Ent,tex,0,1
FreeTexture tex
End If
Next
End If
End If
End If

From your description it's crashing at the point where control is in Windows hands, so nothing to do with Blitz (?).
I'd check the parameters being fed.

What should i do? Plzz help. The link to the Beta is http://twicfall.com/CS3D.rar

First. Try to create a terrain and apply a bump map. It works fine. But try to restart the app, and open the world.csw. Then try to apply the bumpmap. Then it crashes.
(Select a terrain in the terrain list first, before you can take any action)

LoL.. Now i tried to use the BCF_RequestFile instead, and now the same error occurs!!!

Dammit i've found the bug.. A WritePixelFast command have written too many pixels and got access to some other memory in the app, and it caused it to crash..

So we can say this is not a bug. Tho, didn't even know writepixelfast can access the ram that way.