Copy Attachments using GetFile

[juergenbauer]

Hi everyone,

developing a Web Part that is copying an entry from a list to another list (both Issue Lists) I currently faced to a problem:
I have two list items - one is a already existing issue (the 'currentItem'), the other one is a new entry (the 'newRequestItem') to be created in an other list.
I already copied the field values and now i would like to get the attachments as well.

... some code ...

SPAttachmentCollection currentAttachments = currentItem.Attachments; 
SPAttachmentCollection newRequestAttachments = newRequestItem.Attachments;

int nofAttachments = currentAttachments.Count;
output.Write(SPEncode.HtmlEncode("nofAttachments: "+ nofAttachments) + "<BR>"); // number of attachments is correctly dispayed

string urlString = currentAttachments.UrlPrefix;
output.Write(SPEncode.HtmlEncode("attachment URL: "+ urlString) + "<BR>"); // the URL is also correctly dispayed

string fileName;
string fileUrl; 

for (int p = 0; p < nofAttachments; p++)
{ 
fileName = currentAttachments[p];
fileUrl = currentAttachments.UrlPrefix + fileName;
output.Write(SPEncode.HtmlEncode("File to get: "+ fileUrl) + "<BR>"); // the URL+Filename is correctly dispayed

string attachFileString = changeRequestSite.GetFileAsString(fileUrl);
output.Write(SPEncode.HtmlEncode("String from File: "+ attachFileString) + "<BR>"); // no problem to get the content of the file

SPFile attachFile = changeRequestSite.GetFile(fileUrl); // ERROR: Value does not fall within the expected range.

byte[] binFile = attachFile.OpenBinary(); // code not executed 

newRequestAttachments.Add(fileName, binFile); // code not executed
}
newRequestItem.Update(); // code not executed

... some more code ...

As described under the 'SPWeb'-class in the SDK-Reference the public method 'GetFile' should return the file object (SPFile) located at the URL specified in the provided parameter string. However, the hard I try no SPFile is returned. Is there something wrong with my code or is there a mistake in the SDK?