jQuery Grid Plugin - jqGrid

Hi, I have 2 grids in site with using formatter date. First grid work perfect. But second one is displaying bad date.

JSON data:

.....

"started":"2012-06-29 13:44:24"

.....

With using:

formatter:'date',formatoptions:{srcformat:'Y-m-d H:i:s',newformat:'l, j. F Y, G:i:s'}

it display:

Sunday, 1. August 2027, 0:00:00

Without it display:

2012-06-29 13:44:24

I am using jqGrid 3.8

Any idea what is wrong with formatter?