After inserting the removing tools, they must be pushed outward, or away from each other and then the unit should slide out.
It is important to note that you should not need to insert the tools forcefully. You should be able to insert them and feel them stop and then you should be able to release the mechanism by doing as above. If you jam the tools in too deep, you may mess up the mechanism so that you will have to disassemble the dash further for access.
It is also possible that the mechanism was damaged on installation because it was forced in without properly lining things up. If so, you will need to take the dash apart for access.
I don't remember what is needed to get to that part of the dash, maybe someone else can post about that if you need to go that far.
