Text Wrap

Hoping someone can help me. I'm using the envelope to wrap test around a bitmap image. If I have three columns of text and use the envelope on the first column, the text dissapears from the other columns. If I delete the last two columns and use the envelope, I can link the remaining text to a new column. However, if I then try to use the envelope on the new column as well, the test dissapears. I hope I've explained that OK. Thanks in advance for your help. Larry