display problem in thunderbird

hi i am using this mozilla thunderbird portable from past few months
i am happy to have my desktop email client in my pendrive
i have display problem in thunderbird
i have updated and reinstalled several times but this cant fixed my problem.

the problem is on message i am getting a lot of information like this

from
date
to
x-account-key
x-uidl
x-mozilla status
x-mozilla status2
delivered to
recived
message id
.
.
.
.
.

and lot in the pane all this fields are filled with the data
now i cant able to read the message

any body fix this problem ?
i want to give a screen shot of my problem
but i didn't get any option here to post screen shot

thanks in advance