Hi, 
From your description it seems that you're having having problems with the string formatting. 
You can find the string handling VIs in the String sub-pallete. A very useful VI to format complex strings is the "Format into string.vi". 
LabVIEW comes with a few string handling examples.  If you're using LabVIEW 6.1, you can go to Find examples and search for "string". 
You can also check the LabVIEW support site:
http://www.ni.com/support/lvsupp.htm
DiegoF.