Field enhancement through EEWB and AET

Hello experts,

I have a requirement where I have to create certain custom fields in CRM Sales Order as well as in R/3. I was using EEWB. I have mentioned all Packages, Transport requests for both the systems. But, when I run the wizard, it gives me an error 'Task Sequence CRM_BTX_NEW_FIELDS_OLTP does not exist'.

Could you please let me know why this error is coming?

Also, if I use AET instead of EEWB, will my fields get added to my R/3 system also? Or I would require enhancement at the R/3 side also?

Please advice.

Thanks,

Debolina