Excel Export formatting problem

When i export my report to excel , i see extra empty rows between data rows .What might cause that?Does anyone have an idea?What do you mean by extra rows? Do you mean blank rows?|||Yes,blank row are involved...|||Do you get blank rows between data or at the end?|||i get blank rows between data rows (between every one of them)|||Do you see blank rows in preview mode of the report?|||Not in preview mode , when i export the report to excel ,i see blank rows in excel sheet|||It may the problem in EXCEL. Try to increase the width of the cells|||Thanx,i will try