VBS skip code when check box missing

Hi,

I have a problem with check box which is not always available.

When this check box is present it should be unchecked and then should be pressed ENTER. This will unlock some additional fields which subsequently will be edited.

session.findById("wnd[0]/usr/tabsTAXI_TABSTRIP/tabpT\05/ssubSUBSCREEN_BODY:SAPLV60F:4203/chkRV60F-KFREL").selected = false

session.findById("wnd[0]").sendVKey 0

Then is the script which edit available fields

s=0

Do

If session.findById("wnd[0]/usr/tabsTAXI_TABSTRIP/tabpT\05/ssubSUBSCREEN_BODY:SAPLV60F:4203/tblSAPLV60FTCTRL_FPLAN_TEILFA/ctxtFPLT-FKSAF[10,0]").text="A" Then _

session.findById("wnd[0]/usr/tabsTAXI_TABSTRIP/tabpT\05/ssubSUBSCREEN_BODY:SAPLV60F:4203/tblSAPLV60FTCTRL_FPLAN_TEILFA/ctxtFPLT-AFDAT[0,0]").text= sht.cells(i,11).Text

session.findById("wnd[0]").sendVKey 0

s=s+1

session.findById("wnd[0]/usr/tabsTAXI_TABSTRIP/tabpT\05/ssubSUBSCREEN_BODY:SAPLV60F:4203/tblSAPLV60FTCTRL_FPLAN_TEILFA").verticalScrollbar.position = s

Loop Until session.findById("wnd[0]/usr/tabsTAXI_TABSTRIP/tabpT\05/ssubSUBSCREEN_BODY:SAPLV60F:4203/tblSAPLV60FTCTRL_FPLAN_TEILFA/ctxtFPLT-FKSAF[10,1]").text=""

I need to modify the script to skip first two rows( checkbox and "Enter") when chech box does not exist and to continue from s=0.

I will be very thankful if you advise me how to solve this problem.

Regards,

Guero