VM WORKSTATION 9/10 cant't COPY/POSRT oR DRAG FILE

DEAR：

I have install VMWARE STATION 9/10，

AT first ，IT can COPY/POSRT oR DRAG FILE.

but sometime i restart the guest OS，THE THIS GUEST can copy/post or drag file form HOSt to GUST.

I had remove the VM Tools ,and Reinstall it agian, but it no work.

so, it there some soluation?

thx