This is working but getting problem

but first it displays 1st page and 2nd page properly and if  i click on last button then it goes to last record properly.

but problem is that

 when i clicked on next page(3) then it shows only again 2nd page again do not go further.but page is loading on 2nd page only

tell me solution ..

i wrote  like
recordnumber mod 3 =  0 and not OnlastRecord

its working but geting above problem..
 Plz Reply me..