ehm, offenbar lag es doch an vista.
auf einer englischen website steht, wie man es konfigurieren muss.
dieser anleitung bin ich gefolgt und nun geht es.
hier die anleitung, falls jemand dieses problem ebenfalls haben sollte:
1. Go to your root RMXP directory. (Usually CProgram Files\Enterbrain\RPGXP)
2. Right click RPGXP.exe and choose "Properties".
3. In the "Properties" popup, go to the "Compatibility" tab.
4. Check the box that says "Run this program in compatibility mode for:" and select "Windows XP (Service Pack 2)"
5. Check the box that says "Run this program as an administrator".
6. If you cannoth check the box mentioned in step 5, follow steps 7 through 11.
7. Click on the button that says "Show settings for all users".
8. Click the "OK" button on the "Windows needs your permission to continue" button, after inputting the password of the specified administrator if necessary.
9. Check the box that says "Run this program in compatibility mode for:" and select "Windows XP (Service Pack 2)"
10. Check the box that says "Run this program as an administrator".
11. Click the "OK" button.
12. Click the "OK" button.
13. Right click PSIKey.dll and choose "Properties".
14. In the "Properties" popup, go to the "Security" tab.
15. Click on the "Advanced" button.
16. Highlight the permission entry that says "Users ([your computer's name]\Users)" where [your computer's name] is whatever you named your computer. (Mine is Media-PC)
17. Click the "Edit..." button.
18. Highlight the group "Users ([your computer's name]\Users)".
19. In the pop up that appears (It should be named "Permission Entry for PSIKey.dll", check the "Allow" box for the option "Full Control".
20. All of the "Allow" boxes below the box you just checked should now be checked as well.
21. Click the "OK" Button.
22. Check the box that says "Include inheritable permissions from this object's parents".
23. Click the "OK" button.
24. Click the "OK" Button.
25. Click the "OK" Button.
26. Run RPG Maker XP, and you should no longer get the error message!
mfg
Aeternalis