Migration incomplete?

[novasonic]

sorry, i have 297 products, migration tool  can't migrate all product, why?
I modified memory at 1024 Mb
and limit time to 120.
what is happen?
thanks, for your time
joomla 2.5.2
virtuemart 2.0.2

[novasonic]

I have this message after do migration

Found prior migration process, resume migration maxScriptTime 143 maxMemoryLimit 1013
Archivos %s de media sincronizados en el directorio %s.
Archivos %s de media sincronizados en el directorio %s.
Archivos %s de media sincronizados en el directorio %s.
Archivos %s de media sincronizados en el directorio %s.
Looks everything worked correct, migrated 0 categories
No categories to import
Looks everything worked correct, migrated 0 manufacturer categories
Looks everything worked correct, migrated 0 manufacturers
Found 297 vm1 products to import
Worked on general migration for 4.6408979892731 seconds
1
Info: Migration: 60 products processed

do you have any idea? only 60 of 297 products processed .