Welcome Pam!
If you have the forarm off and move the top lever over, do the barrels pivot so the chambers are exposed? If so and the barrels won't lift up and off the receiver, then the cocking hook is not releasing from the bell crank in the well of the receiver. You need to have the hook clear the receiver before the barrels will come off.
I'll try and supply the link to a previous thread which should give you some help. If the link doesn't work, search this forum, type in "Barrels won't come off" and find the thread titled "Stuck Parker Barrels." Hope this fixes your problem.
http://parkerguns.org/forums/search.php?searchid=121906