Trouble with For loop

[Mala]

When the inner for loop is over the controls are passing to the next higher for loop but gets stuck in the first statement of the outer for loop saying the parameter is incorrect.
Here is the code I am using

Code:

For i = 1 To 4  ---- When the inner loop is complete the next value in ---------the datatable is not retrieved and the error pops up 'parameter --------incorrect'
Browser("x").Page("y").WebRadioGroup("RB").Select DataTable("RB", dtGlobalSheet)
For j = 1 To 8 ---- This loop executes perfectly
[statements]
next
next

Any ideas please