1.2.5 vanilla mc server to Tekkit wont work

[Deadpanda]

i have a 1.2.5 vanilla minecraft server and i want it to be a tekkit server, i've tried just to copy the world file to the new tekkit server while erasing both the old tekkit world file and nether and end files. but everytime i try to log in to the server says "must have forge build #136+" and i cant seem to figure out why. i know it have something to do with the version of the server not matching but how can i change that? and btw i haven't updated the server to the newest version, i know that because i stoped playing on the server about 3 months ago

[greedseed]

hmmmm i think you are newb to tekkit dont i ?

wel first you might try to see if the version of your server is the same version of you client a ;)

[John West]

You change the client Tekkit version in the Technic launcher. Click on options, click the "manual build selection" bullet, and select the version from the drop down menu that matches your server version.

[Deadpanda]

umm i tried changing the version of tekkit but it still didn't work, how can i see what version my server is?

[John West]

You don't remember which version you downloaded? Other than the original filename, I have no idea how to determine which version you have.

Edit: Look in your downloads folder to see if you still have the downloaded Tekkit zip in there.