400 bad request

hell..I am sending this message co’z its 1 week now i’ve never solve this problem..

here is the message of the error:

http://prcbhl.hostei.com/wp-content/themes/Calypso/timthumb.php?src=http://prcbhl.hostei.com/wp-content/uploads/2011/11/IMG_4320-650×280.png&h=180&w=350&zc=1

my site is a free hosting co’z i want it to try it first before i will buy a new one..

thanks wordpress..