Section 179 disallowed

This makes no sense to me.  I have rental property that qualifies as a business and I select that option in TurboTax, but it disallows any Section 179 deductions.  I have Mobile Home park which is my only source of income.  I have 30 spaces and 10 mobile homes that I rent.  I file Sch E.

 

I can select the Special Bonus Depreciation with no problem, but I just don't understand why TurboTax doesn't recognize me as a business even though I make the business selection within the program.