Anyone know how can I solve this ?
In order to know how to fix it, you must first diagnose what the problem is.
Two things you should verify in Slic3r:
If both of these checks are positive, then the problem is probably not with the slicer but with the printer or printer setup. The ultimate proof of this would be to try another slicer like for example cura.
If the problem is with the printer, the only obvious one I can think of, is that the bed is too high, the nozzle touches is, and the plastic cannot be extruded for the first few layers.
You can confirm or refuse this hypothesis by simply observing the printer while in operation. If it is the case:
If you realise this is the problem, stop the print immediately: this is the typical situation in which you could generate a clog in the cold end of your extruder, which is not a permanent damage, but fixing it is a somewhat complex and tedious procedure.
The good news is that if this is the problem, the solution is trivial: you should simply set the nozzle height correctly. How to do this changes from printer to printer and you should refer to the user manual of your printer. Here is a video showing a few of the most common method to achieve that.