jQuery Grid Plugin - jqGrid

hi,

i have a cell defined like this :

stype:'select' url :'yyyyy'

that fills the select box with options and all works fine .

for example:

when using  filterToolbar the first element in the select box is  '<option>ALL</option>' and the filter being sent to the server is 



{"groupOp":"AND","rules":[]}


that returns all results.

but when using regular search the filter being sent to server is 



{"groupOp":"AND","rules":[{"field":"column_10112","op":"eq","data":""}]}


that returns no results , is there any way to make regular search behive as toolbarsearch?