Question [Q] problem هin the dail pad mtk6572

hi all
i have samsung s7562 mtk6572
the problem when i press # after three number or above disappear all the numbers i pressed in the dial pad
for example:
press *22# its ok
press *222# not ok disappear all the numbers i pressed in the dial pad
press *22222# olso not ok disappear all the numbers i pressed in the dial pad

that mean phone canot do any ussd or code

which file can cause this problem in system?????

my phone full root access and installed root explore

this info for mtk driod tool

Hardware : MT6572

Model : GT-S7562

Build number : IMM761.S7562ZCALK2

Build date UTC : 20131203-081739

Android v : 4.2.2


Baseband v: MOLY.WR8.W1315.MD.WG.MP.V1, 2013/07/09 18:02

Kernel v : 3.4.5 (utk001@utk001-desktop) (gcc version 4.6.x-google 20120106 (prerelease) (GCC) ) #1 SMP Tue Dec 3 16:15:01 CST 2013



sorry for my bad english