Request Time Out

i have Connected to MSAccess using OLEDB in ASP.Net. I have opened the Connection.
i have a dataset which contains a table with 500 rows and about 140 columns. I have used nesting for loops to read every row and column of the dataset Table.The Problem is if i read 60 rows with all columns then it is working fine but if i read more than 60 then it shows Request Time Out. i tried with all 500 rows but 20 columns it works fine but for more than 20 columns the same error.I Have opened the connection once before for loops. and closed lastly.i tried to use Connect timeout but it didnt' work? How could this Problem be solved.