I beleive I have the same 4GB card you do (A-Data 150X here: http://www.newegg.com/Product/Product.asp?...N82E16820211319 ) and can confirm it works well with this Crucial USB2.0 SD "stick": http://www.newegg.com/Product/Product.asp?...N82E16820301006 .
Hope this helps!