This may not be a perl problem. I am currently doing a similar thing trying to pull data out of foxpro dbf files and put them in other SQL databases. Some lines are not coming across because there are subtle differences in the data types between the data source (foxpro dbf) and the destination.

To figure out what was going haywire, in my case, I tried importing the data into a MS Access database using a system DSN. Some rows generated an error because the value in an integer feild in the row on the source was too large for integer feild on the destination table.

Maybe checking the differences between the values allowed for each datatype in dbf's Vs Mysql might shed light?