Received I 797B with I 94

[whatismystatus]

I have received I 797 B with a valid I 94 with class H1B .MIne was H4 to H1B .I was in US while I applied and not travelled outside .what should i do???

In the petition it is written that the petition and cos has been approved.

But I received I 797B

Is it Ok???

 

[GotPR?]

I think it's a simple mistake(though I wonder how it is possible to mix up I-797B and I-94). It shouldn't be a big deal, but I'd talk to lawyer if I were you.