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OpenGL SOLVED ! getting data from shader fbo output

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My shader with fbo and multiple render targets seems to execute without error. NowI needto get the output data back from one of the targets which will be in GL_COLOR_ATTACHMENT1_EXT. So I use the following as given in numerous shader examples:
glReadPixels(0, 0, itexSizeW, itexSizeH, GL_RGBA, GL_FLOAT, 
where textureData is an array of floats
I get an error each time of value "invalid enumerant" after the read buffer call. Do I need the ReadBuffer call ? Is there something else I need to set up ? Problem was due to deleting the fbo before doing the above [Edited by - ade-the-heat on May 21, 2007 5:01:00 AM]

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