Mailmerge - connection settings vba -

i have problem mailmerge macro in part:

wdocsource.mailmerge.opendatasource _     name:=strworkbookname, _     addtorecentfiles:=false, _     revert:=false, _     format:=wdopenformatauto, _     connection:="data source=" & strworkbookname & ";mode=read", _     sqlstatement:="select * `mailing$`" 

can me change connection settings? try many ways dont run correctly.