ACP Problem

[Alfi]

Today I notice I have problem login to my own site. The password don't work. In MyPHPAdmin I change it and login. Then go to ACP...and find that the left frame is ok. But in right frame I have "worms" sign strings (exmple- "Jç\0tCB��_�#Żŕf Řiw9Ň&?�LÔČ"�`ŰŚžc"). Only some work good as "clean cache", "backup" or "phpinfo". What happen to it and how I could fix it ? Please help me !  I wont reinstall all !

[mawenzi]

... upload the folder /admin/ from your backup ...

[Alfi]

I do that but it don't fix the problem. Only change  that not see the "worms" only blank frame and when want change for any option from left frame it give me always the question - "Do you want open or save the file ?". And the describe of file is "unknow type of file". Screenshot as on image below.

I even can't logout from ACP in this situation because it give this same result as above.

[Acidgod]

Then try to reupload all php files...

And please make a screenshot from the "worm sign strings"...

[Alfi]

I did it... and it is still this same situation. Nothing change. 

Acidgod, I can't now make the screenshot from this "worms" because after fist my try fix problem (upload admin folder as has write mawenzi) I've got blank right frame panel. Most strange is that I have such question as in screenshot above. I don't know php but my logic wisher me that php shouldn't be "visible" in such situation and shouldn't want to be opend or saved. 
But the "worms" string example in my first post is part of really "worm" I have got.

[Acidgod]

This looks like a Server/Apache Problem...

[Alfi]

I don't know but think that rather not. I just upload t server another gallery for test. After install it work very well. But don't want and can't use that gallery because it hasn't option which I need.