url not work after change channel name

[xman2014]

i have a hindi language forum.
few days ago i change a channel title, after change name now url not work.

how can i clear url cache from forum.

here is link:
http://www.hindivichar.com/forum/%E0...A5%82%EF%BF%BD


i change title from मंच-प्रतियोगिताओं-के-लिए-आवेदन-तथा-सू�
to मंच-प्रतियोगिताओं-के-लिए-आवेदन-तथा-सूचनाएं

[xman2014]

anybody is here for solve my problem

[xman2014]

where is vbulltin support team

[xman2014]

i am waiting from 6 days..

[xman2014]

can anybody here for solve my problem ???