Crystal Reports Still about IF Else Then

Message

Hello
I'm fighting against this code for days and I cannot make it works. I'm creating a formula that should return a different text, depending on content of different fields, but it seems to be stopping before the first ELSE. These the codes I tried so far:

1) 
If {TAB_A.QTD} <= {TAB_B.TOTAL} 
    then (If {TAB_A.TBR} = "x" Then "TBR"
    else (If { TAB_A.OL } = "x" Then "OL"
                else (If { TAB_A.CIA} = "x" Then "CIA")))

2)
if {TAB_A.QTD}<={TAB_B.TOTAL} and {TAB_A.TBR}="x" then TBR'
else if {TAB_A.QTD}<={TAB_B.TOTAL} } and {TAB_A.OL}="x" then ‘OL’
else if {TAB_A.QTD}<={TAB_B.TOTAL} and {TAB_A.CIA}="x" then 'CIA'

Thank you all for any help.

Mari