Please help

Could someone please help me out? Ever since I cut and pasted thr directory rpg2003 from C:\ to D:\, the program itself is malfuctioning. Please, someone help, I'm in the middle of the game development and I'm the only maker.

As I said, it worked flawlessly untill I cut it and paste it into another drive. From then, two things are always happening:

1. It wont make a new project in any directory. If I click on the "New project" button, it says exactly "Project creation could not be completed." If I wait a while, and then click on tileset window, it says exactly
"Assertion failure (D:\ha\02rpg2000\2003\RPG_RT\GR_ChipSet.pas, 489 line)".

2. When I open my old project, or any existing project, I make a new map, but it doesnt get saved, even though I clicked "Yes" when it says do I want to save my progress. When I try to click on it, go to "Map-Save changes made to map", it says exactly "The file C:\DOCUME~1\x\LOCALS~1\Temp\RPG_TEMP\Map0004.lmu cannot be created." and it says the same whenever I try to switch maps after that.

In brief, I cant make new projects, or edit the old ones, so I cant do nothing. I've tried uninstalling and reinstalling at least a few dozen of times, with a lot of versions, but it didnt work.
I Googled this problem, but only two of them seems to have it except me, and they havent been answered.
The old path where RM2K3 was is C:\rpg2003, and it worked there. These problems started when I moved it for space on C to D:\Program Files\rpg2003.
Please help me if someone can.