WG311v2

I have an old pentium computer running windows xp home edition version 2002 service pack 3 and a WG311v2 which was running perfectly ok with my netgear adsl firewall router DG 834G

i have changed to fiber broadband and have been supplied with a Huawei HG 633 router.

the pc kept sayingthat the new router didnt have a certificate; that has now been resolved

but i still cant get the pc/netgear WG311v2 to connect to the new Huawei router.

How do i do this; os is the WG311v2 too old to connect wirelessly to the new router.

I have been given a 1 metre ether connection; that is not long enough;

if i were abelt to get a longer etherneyt cable [ i am not sure if i can] would that be a solution?

any help gratefully recieved ;

i am not that computer savvy

bob