tagging using signature messsages coms up with an error

the only way that currently works is to have your website show a page that mentions your bitcoin address. and then in blockchain.info us the ''website link" verification

https://blockchain.info/tags?form_type=1

where you type in your bitcoin address

write the tag you want to appear

paste your website page that lists the same bitcoin address

do the captcha


..

most people make a website page that simply says "hey folks this is my donation address: " <insert bitcoin address>

You dont

once you submitted all the info, then blockchain.info staff verify what you have submitted is correct, can take 48 hours, so just be patient