H4 visa

[immihelp]

Hello,

I'm holder of an H1B visa that start now and expire at 31 oct 2010. But on my wife's H4 visa it is written that it expires on 14 march 2008. I don't really understand that. Can she come in the USA and come back in paris during march for a round trip? Because she has to go and back several times between USA and France during march.
Thank you.

[immihelp]

She can enter USA until the I-94 date on her visa stamp. After that, she needs to get H4 visa stamped again.