Blackberry storage issue via USB

[nicked]

I already posted this message in an other category until i noticed this one and realized that it is more precise. Sry but i dont know how to delete messages -_-"...
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Hey,
I recently bought a blackberry and have been uploading videos on to it from my PC with the USB cable. However, now when i plug it in, the dialog box asking what action i would like to take ( the same dialog box as with a usb stick ) no longer appears. In "My Computer", there is no icon for the blackberry. However, when i launch the software related to uploading music on to the blackberry, it works... (but this program is just for music, but i want to upload videos as well).

If anybody has any idea of what is happening i would appreaciate if you could explain the problem.

Thanks in advance,
Nick
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OS: Win7

[mischastar]

Have u tried looking through the manual that comes with the blackberry??

I had a similar problem however I am sorry I cannot remember how to solve it :s

When you open the music programme does the icon then appear? Or is it simply in the programme only?