RG500Q-EA QSCAN not working

Hi there . I am using RG500Q-EA
And the firmware version is
Revision: RG500QEAAAR11A06M4G

It was working well ‘QSCAN’ fuction before.
But I have changed some configuration.
Suddenly, QSCAN doesn’t work.
And I can’t fix it. Please help anyoen know about this.
When I use QSCAN, it is like that below.
Servingcell and neighborcell are working well.

at+qscan=1

OK
at+qscan=2

OK
at+qscan=3

OK

at+qeng=“neighbourcell”

+QENG: “neighbourcell intra”,“LTE”,2600,105,-13,-116,-86,-,11,2,62,0,62
+QENG: “neighbourcell inter”,“LTE”,100,222,-12,-123,-103,-,11,6,0,4
+QENG: “neighbourcell inter”,“LTE”,3050,105,-10,-113,-95,-,0,6,0,4

OK

Oh!! I fixed it the way I upgrade the firmware!!

Great!
I guess you have locked the format or the band.