revalidation of ca ipcc

vidisha (executive) (44 Points)

28 January 2018  
i had registered for ca ipcc on 6 feb 2014.i cleared my first group of ipcc in nov 2016.afterwards i give 2 times group second n i failed. as per icai 4 years will lapse on 6 feb per attempt wise my 8 attempt will be on may 2018.
so please tell me about revalidation ? i have to register before 6 feb or after 8 attempt