EXCEL TASK LOADING MIXED DATATYPES

Hi All,

getting nulls null for mixed datatype column While loading data excel source to SQL server 2012 table
 to over come the issue we approached as below  

1.HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Nod\Microsoft\Jet\4.0\Engines\Excel\TypeGuessRows change from 8 to 0 and 8 to 16 
2. Applied the IMEX=1 

on both above cases failed to over come the issue . how we can sort it out for this scnerio. Help me