I downloaded Metal Gear Solid Portable Ops for the PSN onto my 16GB mem stick for my PSP-3000.  After the 2 hours of downloading and installing, it won't work. It boots up the PSP start screen like it is going to run the game and then everything goes black. no audio. however, when i press home, it asks me if i want to quit with X being cancel and O being confirm(like a proper metal gear game). But that is all i can do. normally, i would download the game again and see if that works, but the psn has a 5 download limit, so i want to put the question out there:
 
Does your digital copy of Metal Gear Solid: Portable Ops work?

the five download limit applies to only things that cost money 
Isn't the demo free?

the demo is for peace walker, i am refering to the first game, portable ops

update, i deleted it and re downloaded it and it works fine now