When i edit program in LAD language , Editor has been stopped working

Hello everybody !

When i edit program in LAD language , Editor has been stopped working.....( dialog tip )  see attachment

i don`t know why?

before the project is i copy from other people.  when i first to open the project to display a dialog to tip "the project "D:\\***\\****" created by unknown language, with Windows Language is incompatible, *********** "

how to sloving the problem?

thanks everybody

oh i put another picture

some time when i edit program first to popup dialog like the picture on attachment .

" Loading symbol  " ( last one is 3278) ,  Editor has been stopped working...

Hello,

what version of Step7 do you use with which Windows version?

Regards

STEP7  v5.5 sp4 HF11,  Windows 7  SP1