I've been playing guitar for about 2 months.. I've been trying to get down a solo for the song "Jesus of Suburbia" by Green day. I can play the entire song perfectly until that one little part in the solo...

G|-9p8p6-9p8p6-9p8p6-9p6---11p9p8-11p9p8-11p9p8-11p9p8-11p8---|
D|----------------------8----------------------------------------10--|

I've tried it a lot of different ways for about a month now but I can't hit it... is can anyone give me any tips for this? Thank you in advance.