HI

Try going directly to 5.4.1
 At least one of the interim versions introduces issues that either need to be fixed or require a roll back.
 Several people who had issues (such as me) going from some version 5 releases to 5.4.1 report that 4.95 - 5.41 works.  Don't know about 5.01 - 5.41
 
 I have read that the xml module can cause issues and is best updated first or removed.
 If you have a lot of third party modules installed it pays to check the developers sites and make sure your instances are 5.4 compatible.
 
 5.41 is well worth the work / stress of an upgrade.
 
 I am sure you know this but it never hurts to also say - back up your site and its database before updating DNN.
 
 Hope this helps
 
 Ian

---

Mutate and Survive