Help please with VLOOKUP formula

I am using a formula to fill in a cell. The formula is in cell J2 =VLOOKUP(E2,Sheet2.A2:B690,2,0).

This is looks up the value from E2 in the column 1 of the table on sheet 2 defined by corners A2:B690, takes the corresponding value from column 2 of the table and enters it into cell J2.

I want to repeat this formula down the column J but when I copy, not only does the reference cell change ie E2 becomes E3 which is correct, but the table cell definition also changes, which is not correct.

How should I write the formula to have the table fixed whilst lookup cell changes please?

Budgie

Sorry, I have it now. Forgot the $$$$.
Duh.