1) Firewall - the license wizard communicates with P Squared on a particular port, if this is not open then the communication cannot happen. If you can adjust your settings of the firewall and you are happy to do so, open TCP 6998.

2) Incorrect Details - we check the information that you've put into the license wizard and compare it to a list of people you have authorised us to issue licenses to. If you change your email address we need to know. If the details don't match we can't issue a license.

3) Different PC - When we issue a license code it is issued to a specific PC. If you need to move that license you can release it allowing it to be licensed again (there is a release button on later versions of the license wizard). If you have a hardware faliure and re-install windows, then this is classed as a different PC and you will need to call or email licenses@psquared.net explaining the fault so we can release the code on your behalf.

4) Security Check - if a license is renewed too many times our system blocks the renewals. This means someone who is authorised from your station needs to call us and we can check to make sure that no unauthorised people are trying to use your license.

5) Overdue payment - i'm sorry to say that if you owe us money we will make it more of an annoyance to license the software and in extreme cases you may have to license the software on a daily basis. We are human and we do understand that payments and cashflow can be a problem sometimes. So please talk to us, and we may be able to arrange different payment terms.

For more details, please take a look at http://forum.psquared.net/Topic2084-4-1.aspx

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Bill Bailey: "No win, no fee, no basis in reality. Just a room above a minicab office in Acton and a steady stream of greedy simpletons whose delusion is only matched by their clumsiness"