why I have these Errors ?

Hello, I am trying to fis as many errors as possible on my forum
Bonus Paradise Gambling Forum

I do have Casino banners on my forum home,
the links itself give already many errors.

But I do see also warnings for xml parsing error like...

Line 508, Column > 80: XML Parsing Error: EntityRef: expecting ';'.
…('/outgoing/http_incomania_com_affiliate_click_do_sourceID_404 6');" rel="nofo…

I have many of these,

I try now to redirect my affiliate links via htaccess
Its done already for the 1st little banner on top, "Absolute slots"

Funny , I cannot do it via my forum/htaccess file
It works in my /.htaccess

Now my questions,

1. If I redirect my affiliate links via htaccess, should i still add a rel nofollow?
like ##<a href= "goto/xxxx" rel="nofollow"...##

2. Why am I not able to do the redirects via my forum/htacess?

3. Can someone please check my errors on W3c and help me to fix as much as possible?

Many thanks in advance

Marina

I redirect now all my aff links on the forum homepage
and i am down to 8 errors