Conditional build tags not working at content level

Please save me from a nervous breakdown - I have spent many hours trying to produce a manual without success. I am using Robohelp X5 with Word 2003 and I am experiencing problems when producing printed documentation. The documents were originally imported from Doc2help and appeared to have converted okay. However when I produce printed documentation only the conditional build tags at Topic level work correctly. I spent may hours yesterday creating a new document in Robohelp and I copied and pasted topics from the affected document into the new document. This worked fine and I was able to produce the document with conditional tags working at topic and content level. However the problem returned after I changed some of the text and content conditional buid tags in the new document.