Ok,
When the ram drive was running before you uninstalled it.
Was it labeled as drive Q:
I am presuming so, since you uninstalled it, with an error of saying insert disk into drive Q: after the uninstall.
Just as a test.
If using windows 7, click on start.
In the search box type : DISK MAN.
Click on format and create partitions.
We want to see if virtual disk manager is reporting a Q: drive since i take it Q: was the ram drive.
Is the Q: drive listed at all.
If so take note of the size it is. Does, or Did it match the size of the ram drive space you made on the setup of a ram drive ?