After installing WebParts on a SharePoint server, you can't see the QV WebPart to insert it on a page.
In the screenshot below I have marked out the folder for QlikView as an example:
Sharepoint site url is different than what the Install.cmd is looking for.
When this happens it may be that you missed an error during the install of the WebParts:

This happens when the SharePoint site is different from the default site for which Install.cmd is looking.
By default this is the line:
stsadm.exe -o activatefeature -name "QvWebPart" -url
http://jcmv-sp –force
In this case, the site is actually http://jcmv-sp/sites/Sharepoint, so we have to rerun the command line as:
stsadm.exe -o activatefeature -name "QvWebPart" -url
http://jcmv-sp/sites/Sharepoint –force
To do this, open a command prompt (best to select Run As Administrator option)
1. Type CD "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\BIN"
2. Select Enter to change the directory
3. Type stsadm.exe -o activatefeature -name "QvWebPart" -url
http://jcmv-sp/sites/Sharepoint –force
4. Select Enter to execute the command
Now if you re-check the Sharepoint site you will see Qlikview under Categories: