pcDNA 3.1/Myc-His(+) B cutting problems

[yitingw from gmail.com]

I have some problem by using pcDNA 3.1/Myc-His(+) B.

I am trying to cut Hind3 and Kpn1cutting sites in order to insert my
favorite gene.

Since I have tried several times and still can not get my favorite
gene inserted, I was wondering

is it possible to cut pcDNA 3.1/Myc-His(+)B by Hind3 and Kpn1 at the
same time?

Would the two restriction enzymes compete with each other since their
cutting sits are near by?