Hello again,
I hate to be a bother, but I have now run into another problem when I try to actually run the GLM in SPM:

Running 'Model estimation'

SPM12: spm_spm (v6015) 11:58:27 - 06/08/2015
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SPM12: spm_est_non_sphericity (v6015) 11:58:30 - 06/08/2015
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Chunk 97/97 : ...processing
Failed 'Model estimation'
Error using spm_est_non_sphericity (line 196)
Please check your data: There are no significant voxels.
In file "C:\Users\Public\Documents\spm12\spm_est_non_sphericity.m" (v6015), function "spm_est_non_sphericity" at line 196.
In file "C:\Users\Public\Documents\spm12\spm_spm.m" (v6015), function "spm_spm" at line 418.
In file "C:\Users\Public\Documents\spm12\config\spm_run_fmri_est.m" (v5809), function "spm_run_fmri_est" at line 33.
The following modules did not run:
Failed: Model estimation

Does this mean that the Denoising step somehow reduced any significance? I didn't include the conditions as confounds for denoising. I am attaching my my batch for spm, if that helps. Would you like the conn.mat file?