Ive got the UK government recommended list that being :

s - Skip navigation
1 - Home page
2 - Newsroom
3 - Site map
4 - Search
6 - Help
7 - Complaints
8 - Terms and conditions
0 - Access key details

I have assigned the relevant accesskeys to my main navigation <a> links, but I still cannot get access via the keyboard to the designated pages.
I understand that different browsers use different key pairing, but with all the variants not working in either browser then I assume Ive made a boo boo with my HTML.I have tried all of the following keyboard processess and none of which work on either Firefox or IE:

shift + "x num"
ctrl shift + "x num"
alt + "x num"
alt shift + "x num"

Have I missed something else out with my HTML ?

example HTML code :

<a href="http://www.website.com/faq_html" accesskey="5">faq</a>

To use the skip navigation where out of interest do I place the "accesskey="s" ?

Thanks all