when i dont play anything rare sound form the amp came, but if i touch the guitar with my hand the sound goes, i dont know if is problem from the jack or from the cable
Could be a possible bad ground in your guitar wiring.

Without more info though I cannot be sure.
1979 Gibson Les Paul Silverburst
James Tyler Variax JTV89
Schecter C1 Classic
Ibanez RG520QS
Greg Bennett Torino TR4

Mesa Boogie Dual Rectifier
GSP1101 & Pod X3 Pro
Peavey 5150 & JSX
Bugera 6262 & 333XL
Carvin V3
Spider Valve HD100
Definitely sounds like a grounding problem. Have it checked out.
Gibson Les Paul Studio
Highway One Telecaster
Dean Evo
Mesa F-50
Laney GH50L
Vox AC30 C2
Ampeg V2
Either the single coils, or the grounding.

This happened with me and it was grounding.
RIP Terje (Valfar) Bakken
you are probably playing with gain. you have to mute the strings or you get feedback
*lust list*
Vox tone lab
Vox ac50
satches time machine
vintage phase 90
Money towards this gear = $0.00

Quote by Doctor Matthews
Yeah I dreamt I was fighting Master Hand, but then I woke up to realize I was jackin' it in my sleep.
That took me a long time to decipher :P

Earlier posts are most likely correct, grounding problem, or you have gain to high etc