NO Transfer Structure Available When loading text data from flat file

looks like a long story, but I

basically have three questions...hopefully they can be answered without screenshot but I'll be happy to email someone those

if they are willing.

1. Why did I get No Transfer Structure Available error.
2. Wy did my text data not show up in

maintain master data.
3. Did I mess up my source system?

im folliwing the addison wesley html guide, if anyone

knows what that is.

steps: I created my application component, then created the infosource for material number and

assigned a data source linked to my flat file source system and activated . I created infopackage for the master data and it

loaded fine with no errors.

Next I created the infopackage for the master text

data (making sure to choose text data upon creating) and chose the external source as a csv file .when i started the update

got the message "no transfer structure available" ...

I made sure the case in the csv file is not a problem and meets

the infoobjects settings in every way….then to be thorogh I went through and deleted, recreated, and reactivated starting

from the infosource and then it still didn’t work. The only thing I found was drilling down on data source and

reactivating it, then when I went back to the ifopackage got warning structure has changed but this time the data loaded

successfully according to monitor…not sure why I had to reactivate the data source because all i had done up until that

point was load the master data..but it worked in any case.…but then I went and previewed it…in maintain master data and

saw the language and desc fields are blank…so I started experimenting…I went into my source system and got mssg ‘load

application component hierarchy from the source system now?’ I clicked yes..then reactivated this source system (when I

think about it I should have answered no because this is a flat file system right?)....anyway i still don't know why the

language and desc fields are missing when I right click on the infosource and choose maintain master data....are my

expecations wrong?

also, now Im thinking i have to start the whole exercise over since i probably messed up the source

system by answering yes to "load application component hierarchy from the source system now?"