h-4 stamping issue.....

[sambhimani]

hi i am 19 years guy,came to US on H-4 visa in june-2006,i got three months visa on my passport and got extension for 3 more years,now i am planning to travel india,but my stamping on my passport is expired,so i was thinking to get stamped in mexico as i have extension,so can anyone help me and give me some information abt stamping,r there any chances of rejection stamping at mexico.

i appreciate help....