Problem Drewolf20 1.7.10 crashes

[zacherymailki]

I have added some mods to my DW20 server and the mod i want to add to it keeps generating a crash report. my client has all the same mods and the mod that i want and it works.

 

[mc.crab]

Caused by: java.lang.RuntimeException: Attempted to load class btj for invalid side SERVER

One of the mods you have added is clientside only mod.

 

[zacherymailki]

ok thankyou for the help