;jsessionid= in URL not supported

I get the below url with jsessionid after logging in my application and get "Not Found"

http://xxx.yy.xxx.x:pppp/portal/;jsessionid=dDIsgr_KfIXFBmxvClAWbY2Z.wfstandalone

if i remove the ;jsessionid=dDIsgr_KfIXFBmxvClAWbY2Z.wfstandalone from url then it works fine...