"usespss" (not "use spss") is not available now and it does not seem to work well in Stata 11.
To make things easier, just save your Spss file as Stata file (***.dta) in Spss (save as), then open it in Stata.
Just had a quick check of "usespss.ado", it seems that it only works for 32-bit Stata (it's still available) but not 64-bit Stata (you can not even get it directly from within 64-bit Stata)