I have changed the farm account's password and now my central admin is not working properly this is how it gets displyed

Please let me know what should i do as this is the dev server of the client...

what procedure have you used?

this one:

On the server that hosts the Central Administration website, type the following line at the command prompt, and then press Enter:

stsadm -o updatefarmcredentials -userlogin DomainName\UserName -password NewPassword

On all other servers in the server farm, type the following line at the command prompt, and then press Enter:

stsadm -o updatefarmcredentials -userlogin DomainName\UserName -password NewPassword -local

execute an iisreset