If you are looking at your data in datasheet view, the memo filed will be displayed as one long text field. If your column isn't wide enough to see the whole field, you will only see part of it. Click on your data in that field and hit the End key and it should take you to the end of your field. If you are looking at the data in form view, the memo field will display with scroll bars so you should be able to scroll to see all the data. Memo fields are different than text fields. 255 character limit on text but memo can store up to 64,000 characters.
Sam