am mad with this prob.ive so many group headers, each1 is subreport.one of de subreports is item, contains under detils section @item desc, @ item casc ,@ @itemmarksandnumber.in this itemmarksandnumber formula i put ({ItemMarksAndNumbers.ItemNumber} = PREVIOUS({ItemMarksAndNumbers.ItemNumber}) in suppress(no drill), without checked check box,but actuelly it shows like this, and it reapeting every no of record
-------------------------
item marks and numbers: m1
item marks and numbers: n1

item marks and numbers: m2
item marks and numbers: n2
item marks and numbers: o2
-----------
but i actually it shoud b like this

item marks and numbers: m1
item marks and numbers: n1
//here second record details should start
//at de end onli remaining part should come like this

item marks and numbers: m2
item marks and numbers: n2
item marks and numbers: o2

my itemandmarks formula contains this

DIM str AS STRING
({Item.ItemSequenceNumeric}))
IF {ItemMarksAndNos.ShippingMarks1} <> "" THEN
    str = str + "Shipping Marks            : " + {ItemMarksAndNos.ShippingMarks1} + CHR(13)
END IF
IF {ItemMarksAndNos.ShippingMarks2} <> "" THEN
    str = str + "Shipping Marks            : " + {ItemMarksAndNos.ShippingMarks2} + CHR(13)
END IF
IF {ItemMarksAndNos.ShippingMarks3} <> "" THEN
    str = str + "Shipping Marks            : " + {ItemMarksAndNos.ShippingMarks3} + CHR(13)
END IF
formula = str

am using xml,

plz help me. thanx in advance