magicans quest mystrious times multi card help!

it works fine, no problems. but as soon as u try to use a multi-card play its says there is a comunication error. ive already tried arm7 any suggestions are greatly apretiated

ARM7 should only be done if it doesn't work at all (save error message etc.). What flashcart are you using? Using latest firmware? http://www.linfoxdomain.com/ds/

ive got R4 V 1.18 its the newest i think.

Hm, it appears to only work on 1.18 after ARM7 patching. You may need to use ARM7 files from other games until it works.

arm7 patch from other games? whats the difference between patching it regularly?

Usually ARM7 patching messes with the wireless functions, files from certain games don't do so. Otherwise, it's just incompatible.

ok so I use dslazy to arm7. would that mess with it? and how do i fix it using another game?

No, it depends which game you get the file from. Just ARM7 patch like usual, just try other games.