Why cant i save cfg doc?

Hello trying to install posky 747 and when i edit the cfg i cant save it any ideas?
Cheers
P.S. just tried itsall the taxi thing and cant save a panel doc either
???????????
Have done it loads of times in fs2004 dont know what im doing wrong here it says the pathname is incorrect
Cheers
P.S. just tried itsall the taxi thing and cant save a panel doc either

Have done it loads of times in fs2004 dont know what im doing wrong here it says the pathname is incorrect