Why did some empresarios choose to disobey the mexican

They lobbied the Mexican government for a reversal of the ban and gained only a one-year extension to settle their affairs and free their bonded workers - the government refused to legalize slavery. The settlers decided to secede from Mexico, initiating the famous and mythologized Battle of the Alamo in 1836.

very positive impact on our industries in the west, sine they promoted settlement and increased the ways in which goods could be transported to market.  

if you could provide an excerpt for me to read i could