The methods HSSFCell.getColumnIndex and getRowIndex seem to be present in 3.5beta4 and svn trunk: http://svn.apache.org/viewvc/poi/trunk/src/java/org/apache/poi/hssf/usermodel/HSSFCell.java?annotate=731715 (see lines 244 and 274)
Perhaps you have an old version of POI on your compile time class path.
