Paypal not returning client to login welcome page

using s2member pro with paypal buttons. Everything is set up correctly, the payment goes through. But, instead of returning client to previously designated login welcome page, I get an error message that says:

custom value in your button code it must start with your domain name. I don’t know if it is ok to just move the domain name up to the front. Ran out of emails to test that one.

$_SERVER[“http_HOST”]

the domain name is in the button code, but does not start with it. Here is the button code:

[s2Member-PayPal-Button level=“1” ccaps="" desc=“Member /$7.99/mos recurring, glad you are joining TNN!” ps=“paypal” lc="" cc=“USD” dg=“0” ns=“1” custom=“throwersnewsnetwork.com” ta=“0” tp=“0” tt=“D” ra=“7.99” rp=“1” rt=“M” rr=“1” rrt="" rra=“1” image=“default” output=“button” /]

Then there is a note to return to home page, click on it and it sends you back to home page, which is NOT my login welcome page.

All notification emails to client and to admin are sent/received. Client can then register with no problems.

Don’t think is is major, but, I am stumped on what to do next. Thanks in advance for your help

Hi,
There is a recent topic regarding a problem similar to yours at this address: Click Here
You may need to add the attribute sucess = "https://yourawesomesite.com/yourbestthankyoupage/" to your payment shortcode.
Thanks.

Tried and failed. I did leave a detailed message in that thread though. Thank you both for responding