vi paste problem

i encountered a vi paste problem on aix platform. when i copied some sources from windows and then pasted it into a vi window, many <TAB>s were inserted automatically in front of each line. (i.e., one tab for line1 and two tabs for line2 and etc) but this problem cannot be repeated on linux platform.
anybody knows how to solve it? thanks in advance.

Try
:set paste

the aix 5.3 returns

"ex: 0602-093 paste is not a recognized option. Use set all to see all options."

after received the command.