What's the version that you are using?
If it is BI 4.1/BI 4.0 then you should go with the below URL:
Absolute URL: http://localhost:8080/BOE/Xcelsius/opendoc/documentDownload?iDocID=AWpHZ4WR5AFOhBNd8vs5kMk&sIDType=CUID&CELogonToken=
Relative URL: ../../../Xcelsius/opendoc/documentDownload?iDocID=AWpHZ4WR5AFOhBNd8vs5kMk&sIDType=CUID&CELogonToken=
If it is XI 3.1 then go with this one:
Absolute URL: http://localhost:8080/Xcelsius/opendoc/documentDownload?iDocID=AWpHZ4WR5AFOhBNd8vs5kMk&sIDType=CUID&sKind=Flash&CELogonToken=
Relative URL: ../../Xcelsius/opendoc/documentDownload?iDocID=AWpHZ4WR5AFOhBNd8vs5kMk&sIDType=CUID&sKind=Flash&CELogonToken=
Refer below thread:
Xcelcius Opendocument Link on BI 4.1
Hope this helps.
Regards,
Niraj