I am an EEA citizen who has Registration Certificate issued

I am an EEA citizen who has Registration Certificate issued by Home Office 5th May 2011. I am planning to apply for permanent resident card on 26th of September 2015 as I was continuously based in UK since 26th September 2010 even without UK Residence Documentation for a national of an EEA State. I was residing and working under Accession State Worker Registration Scheme (all papers are in place) from 1st March 2010. The WRS scheme was terminated in spring 2011 but I continued working with the same company until 31.12.2011 and get paid with P60, etc. From 27.01.2012 up to now I am working in another company (Ltd.) as a director and main shareholder. All papers such as of Company House, VAT are in place and all required reports to HMRS were submitted in time. This company was not trading (was dormant) until April 2014 and I was not paid during this time and I was not registered as unemployed or seeking a new job. All relevant info about the beginning of company trading was submitted to HMRC as per their regulation. I did not plan to get any unemployment benefits at all. I was self-supported/maintained but kept developing new business for company that started bringing the results only in 2014. I do not have any P60 for that period of time. But I was all the time the Director of the Company and based in UK with some short business trips outside. I have strong links with UK as I have family here, home. My children are being educated here. I did not pay NIC in 2012, 2013 but requested HMRC if I could pay voluntarily. They sent me a National Insurance Record and break down with dates by which I might pay the outstanding sum, which I can do without any problem. My question is: Is any problem with that period for Permanent Residency application when I did not get any salary as I was developing new business in order tomato EU/UK residency regulations for qualified persons (worker) and if not, do I need to fill the NIC gaps by the date I submit the application? Thanks in advance for your comprehensive answer XXXXXX

PS I have comprehensive insurance since September 2010