VI editor keeps automatically adding new lines with "P" char ..

Hello,
I am on AIX operating system. Recently, when I open any file in vi editor, it starting adding lines automatically with "P" char in the beginning of each line. This also happens when I open crontab ( crontab -e) ..I have looked in to my .profile and nothing has changed in there for such behavior..For e.g. , see below...

>vi text1.txt
P
P
P
P

I appreciate any help to resolve this issue.
thanks.

Ok you are on aIX, but you are not in front of the server with a IBM console under the nose or yes it is the case...
So how are you connected to your AIX box ? from a PC via ssh using putty?
I have seen under X sometimes when using dtterm garbage display, forcing you to reset the terminal
HAve you tried typing something like

stty sane

I am not connected direcly to AIX IBM console.. Yes, I connect thru PC via ssh using putty . I did try running "stty sane" but still the issue does not go away...BTW, this is the output I get back when I type "stty -a"..

speed 38400 baud; 24 rows; 80 columns;
eucw 1:1:0:0, scrw 1:1:0:0:
intr = ^C; quit = ^\; erase = ^H; kill = ^U; eof = ^D; eol = <undef>
eol2 = <undef>; start = ^Q; stop = ^S; susp = ^Z; dsusp = ^Y; reprint = ^R
discard = ^O; werase = ^W; lnext = ^V
-parenb -parodd cs8 -cstopb -hupcl cread -clocal -parext
-ignbrk brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr icrnl -iuclc
ixon -ixany -ixoff -imaxbel
isig icanon -xcase echo -echoe -echok -echonl -noflsh
-tostop -echoctl -echoprt -echoke -flusho -pending -iexten
opost -olcuc onlcr -ocrnl -onocr -onlret -ofill -ofdel tab3

Have you tried login with another account?
Just to be sure you have not a corrupted environment....

yes i did try logging with 2 accounts(my personal as well as service account) both had same issues .. also I asked unix admin to logon to the server and he sudo'd to these 2 accounts from his root account, strangely he did not have the same issue as I am having when he sudo' to these accounts ..